Re: [Boost-bugs] [Boost C++ Libraries] #2915: Request for allowing ParameterSpec to be defined by an MPL sequence

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #2915: Request for allowing ParameterSpec to be defined by an MPL sequence
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-06-08 01:31:22

#2915: Request for allowing ParameterSpec to be defined by an MPL sequence
-------------------------------+--------------------------------------------
  Reporter:  e_r               |       Owner:  danielw  
      Type:  Feature Requests  |      Status:  new      
 Milestone:  Boost 1.39.0      |   Component:  parameter
   Version:  Boost 1.38.0      |    Severity:  Problem  
Resolution:                    |    Keywords:           
-------------------------------+--------------------------------------------

Comment(by e_r):

 Replying to [ticket:2915 e_r]:
 > May I please suggest that a metafunction be provided that maps an mpl
 sequence such as
 >
 >  typedef mpl::vector<r1,...,rn> IN;
 > //each r is of the form required<T> or required<T,P>
 >
 > to the template class boost::parameter::parameters instantiated with
 > the elements of that sequence:
 >
 >   typedef parameter::parameters<
 >     r1,
 >     ...
 >     rn
 >   > OUT;
 >
 > This need arises when we can generate IN automatically, for example:
 >
 > typedef mpl::transform<range_c<1,n+1>,meta_r>::type IN;
 >
 > Thanks.

 Still on this problem. I'm wondering if mpl::unpack_args could to solve
 it.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2915#comment:1>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.